Can anyone tell me what and the hell is going on with these ladies???

These photos were taken this morning, they are almost 4 weeks into bloom (from flipping to 12\12 ). PLEASE does anyone have any idea's?
Here is the breakdown
Promix with nothing added
FED advance nute sensi a and b as directed by the nute calculator except for not adding bud candy as directed. Cal mag added 1 1\2 teaspoon per gallon about a week ago, then another 1 1\2 teaspoon per gallon last watering which was Thursday. Then last night fed with foliar fed with calmag 1 teaspoon per gallon.
RO water
Co2 at 1200 ppm
Temps around 85 degrees during day, around 73 at night.
RH kept between 40-50%
1000 hps

It's a little weird because it seems to only be happening to a majority of the ones directly under the lights, not quite as bad on the ones on the outskirts of the lights.

Overfed, underfed? My growing condition should be perfect and my co2 is pumping, does anyone think that they are metabolizing to quickly that I'm not feeding them enough. Thought it was a mag def cause didn't add calmag until about the 13th day in and on the label of sensi bloom the mag ratio is 0.07%

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they look spot on to me?
4 weeks into flower i would expect leaf yellowing like that.
but im a noob still learning.

I was thinking that I had a mag def cause i didn't start adding calmag until about a 9 days ago, I noticed that on the bottle that they only put 0.07% mag in their food. My growing conditions should be perfect so and I noticed that the ratio of their mag is 0.07% in sensi bloom and now that I look at the older jar of big bud the ratio of mag in it was 7% does anyone this this is a mag def?? Could this be light bleaching? It has never happened to me, the leaves have a yellow marbled look to them but they aren't burnt at all, lights could have been a tad bit to close so I backed them off, like I said it's kinda weird because it's mostly only happening to the ones right under the bulb. Has anyone even ever had leaves bleached by light and if so could you post some pics of it cause i have never seen it. Other than the marbled look of the leaves the actual leaf is in decent conditon.

Just your average mid flower nitrogen crash.

You could try to correct it using a number of different methods, but you could just cause yourself bigger problems in the end.

Or you could just keep doing what you're doing and let the plant consume the nutrients in the leaves that it thinks it no longer needs.

Good luck either way.

Is it this common for these to do this, this early? My buddy used to make my soil for me so thats why i'm somewhat new to the advanced nute food. I used to never get any yellowing during flowering of my fan leaves until around the last 2 weeks of their lives when I flushed. Ok so how do they look for 25 days after flipping to 12\12? I want a food that will keep em green until I decide that they no longer should be green lol And I forgot to mention that ph of ro water after adding food is 6.3 and I just flushed one of the pots and the runoff was 6.1 so I don't think im getting lockout

you probably don't need that much cal/mag. once in a while is fine,not every watering. they look good, maybe a little nitro def.

ya im gonna lay off the calmag but do you think this is gonna effect my bud development?

max316420 said:

ya im gonna lay off the calmag but do you think this is gonna effect my bud development?

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no, your fine. If your that concerned with the yellowing, feed them next time with a grow nute that has a higher nitrogen amount.

I use foxfarm grow big and love it, should I foliar feed light with it or not during flowering? uuuugggg guess im just used to them staying green up until I flush and maybe i'm just over reacting

max316420 said:

I use foxfarm grow big and love it, should I foliar feed light with it or not during flowering?

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I'm not a fan of foliar feeding,especially on my buds. Just water with it next watering

should I add it in with my flowering food of just use it stand alone? they have been fed pretty heavily with my advanced so i'm guessing there will still be enough in my promix

And why type of medium do you use?

max316420 said:

And why type of medium do you use?

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he is in soil, promix, I would just use the grow for the next feeding alone, then go back to your bloom.

I had that happened to my plants sometimes too. Well it could be just that its getting healthy or cal/mag. Can't be from N since, it will show yellow burn spots.
Just give it a nice flushing

I know this may seem a little far fetched but is there any possibility that this could be caused by my air conditioner blowing on them, because it seems like its only happening to the plants where the cold air is coming out... Just a thought....